We have devised a protocol for enzyme-free insertion of dehydroalanine, dehydrobutyrine and thioether crosslinks into translated peptides. In vitro translation using 4-selenalysine and 4-selenoisoleucine as substitutes for lysine and isoleucine yields peptides that can be converted to polycyclic structures using mild chemistry in water. This methodology presents a gateway for exploring the potential of artificial lantipeptides as scaffolds for drug development.
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Seebeck et al. (2011) studied this question.
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